CN113789828A - Load balancing method and system for municipal water supply pipe network - Google Patents
Load balancing method and system for municipal water supply pipe network Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
- E03B1/02—Methods or layout of installations for water supply for public or like main supply for industrial use
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/02—Public or like main pipe systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/072—Arrangement of flowmeters
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/075—Arrangement of devices for control of pressure or flow rate
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
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Abstract
The invention discloses a load balancing method of a municipal water supply network, which comprises the steps of obtaining a planning drawing of the municipal water supply network, numbering, detecting the real-time flow of each subnet, outputting an area set with insufficient water supply, determining measures to be taken according to the area set with insufficient water supply, and controlling the measures to be taken to control a valve and a water supply end. The invention realizes the dynamic monitoring and adjustment of the water supply network, so that the area with insufficient water supply can be adjusted, and the adjustment mode comprises the steps of increasing the pressure of a water supply plant and adjusting water from other pipe networks.
Description
Technical Field
The invention relates to the field of urban infrastructure management, in particular to a load balancing method and system for a municipal water supply pipe network.
Background
Along with the rapid development of cities, the planning of municipal water supply networks becomes complex, the water supply networks are important components of the urban water supply system, and along with the development of the cities, the water supply networks are continuously expanded and changed and are distributed in sister and alleys in the cities, so that the water supply networks are blood vessels of urban living machines. The water supply network connects water supply plants and thousands of households, is the highest-investment construction part in urban water supply systems, and accounts for 50-80% of the total cost of the water supply systems. Therefore, the scientific and reasonable water supply network design plays an important role in city development and people's living peace and happiness industry. The scientific and reasonable water supply pipe network can ensure the availability of service and guarantee the requirements of people for work, production and life.
The water supply network belongs to infrastructure, and is difficult to change after construction is completed, and the variable demand is difficult to be expected at the initial design stage, and the urban planning has uncertainty, so that the existing facility is difficult to meet the demand of the masses for water, and particularly, the water supply system can stop water in some cities during the peak period of water consumption. Therefore, it is a constant pursuit goal of those skilled in the art to design a set of load balancing methods and systems for municipal water supply networks.
Disclosure of Invention
The invention aims to provide a load balancing method for a municipal water supply network, which solves one or more technical problems in the prior art and provides at least one beneficial choice or creation condition.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a method of load balancing a municipal water supply network, the method comprising the steps of:
step 1, obtaining a planning map of a municipal water supply network, and dividing the planning map into a plurality of subnets;
step 2, detecting the real-time flow of each subnet, and marking an area set with insufficient water supply in each subnet;
step 3, determining measures to be taken according to the regional set with insufficient water supply;
and 4, controlling the required measures to control the valve and the water supply end.
Further, in the step 1, a planning map of the municipal water supply network is obtained, and the substep of dividing the planning map into a plurality of subnets is as follows:
obtaining planning map data of a municipal water supply network, wherein the planning map data comprises at least one water supply end and at least one water using end, a background topographic map, pipe sections and the burial depth of each pipe section; wherein, the water consumption end is the water consumption point and the designed water consumption of each water consumption point; the water supply end is a water source point and water supply pressure data information of the water source point;
each water supply end is correspondingly connected with at least one water using end, each water supply end and the water using end connected with the water supply end form a subnet, namely, each water using end at least belongs to one water supply end;
marking the water supply ends in the layout as a water supply end set S ═ S1, S2, S3, …, Sx, …, Se }, and e is the number of the water supply ends;
wherein, the sub-element Sx in the water supply end set comprises all the useful water ends corresponding to the selected xth water supply end, and x is equal to [1, e ]]The water end forms a set Dx ═ { Dx ═ Dx1，Dx2，Dx3，……，DxnN is the number of water using ends below the selected water supply end;
in an initial state, water for each water using end is supplied by one water supplying end and supplied from the water using end to the water supplying end passing the shortest distance, all the water using ends under each water supplying end are not communicated with all the water using ends under the other water supplying end, each water supplying end is connected with a valve for controlling opening and closing, the valve is communicated with a pipe section of the water supplying end, the pipe section belongs to a subnet formed by 2 different water supplying ends, more than one valve can be communicated among the 2 different subnets, and the valve is an automatic valve.
Further, in step 2, the sub-step of detecting the real-time flow rate of each subnet and outputting the set of regions with insufficient water supply includes:
step 2.1, arranging a pressure sensor and a flow sensor at a water supply end and a water use end in a water supply network;
step 2.2, detecting the pressure of all the water ends and the pressure SPx of the water supply end under each subnet and the pressure of the xth water supply end at an interval T0;
step 2.3, calculating the pressure difference between each water using end and the affiliated water supply end, and obtaining a water using end set PLN with the pressure difference between the water using end and the affiliated water supply end higher than a first threshold, wherein the set PLN is { PLNi }, and PLNi represents the pressure difference between the ith water using end with the pressure difference higher than the first threshold and the affiliated water supply end;
step 2.4, if the number of the water using ends in the PLN set is larger than 3, sorting the water using ends in the PLN set in a descending order according to the pressure of the water using ends, sequentially taking each 3 water using ends in the sorted set PLN as one group, taking each group as a water supply shortage verification area, and taking all the water supply shortage verification areas as a water supply shortage verification area set APLN;
in one embodiment, the first threshold is 0.3MPa
Step 2.5, sequentially verifying the water supply shortage verification areas of the water supply shortage verification area set APLN in the step 2.4, and if the number of water using ends in the selected water supply shortage verification area is not 0, obtaining a water using end set AD in the water supply shortage verification area;
step 2.6, calculating the estimated pressure EPi of each water end in the set AD:
EPi＝PSi-(Hi-hi)×(ρg)，
in the formula, EPi is estimated pressure of an ith water using end, PSi is pressure of a water supplying end to which the ith water using end belongs, Hi is water head difference between the water supplying end to which the ith water using end belongs and the ith water using end, rho is density of water, g is gravity acceleration, Hi is horizontal drop, and the horizontal drop refers to height difference between the water supplying end to which the selected water using end belongs and the selected water using end;
preferably, ρ is 1g/cm3G is 9.8;
step 2.7, calculating the trends of the estimated pressure EPi of the water using end and the actual pressure DPi of the water using end in the water supply shortage verification area, and recording the trends as the area pressure degree delta P:
ΔP＝∑(abs(DPi-EPi))/sizeof(AD),
wherein, Δ P is the regional pressure degree Δ P of the water shortage verification region, DPi is the actual pressure of the ith water using end, the estimated pressure of the ith water using end of EPi, abs () is the absolute value of elements in brackets, sizeof () is the size of the elements in brackets, and sizeof (AD) is the number of the elements in the set AD;
step 2.8, judging whether the current water supply shortage verification area is a water supply shortage area or not according to the area pressure degree delta P;
step 2.9, repeating the steps 2.4 to 2.8 until the verification of the water supply shortage verification areas in the water supply shortage verification area set APLN is finished, and marking all the water supply shortage areas;
and 2.10, adding all the water shortage areas into the water shortage area set WSP.
Further, in step 3, the substep of determining the action to be taken according to the set of regions with insufficient water supply is:
step 3.1, traversing the set WSPs of the insufficient water supply areas in sequence, if the current insufficient water supply area is not overlapped with any other insufficient water supply area, judging whether the current insufficient water supply area meets the water supply marginal condition, and if the current insufficient water supply area is overlapped, skipping to the step 3.2;
the marginal condition of water supply is
Min (delta PS) + sigma < delta P ≦ Avg (delta PS) + sigma or delta P ≦ Avg (delta PS) -sigma;
in the formula, Min (Delta PS) is the minimum value of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply, sigma is the variance of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply, and Avg (Delta PS) is the average value of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply;
if the current insufficient water supply area meets the water supply marginal condition, setting a valve which is closest to the current insufficient water supply area in the planning graph as a valve to be opened;
if the current insufficient water supply area does not meet the water supply marginal condition, setting the water supply end to which the water using end in the current insufficient water supply area belongs as the pressure needing to be increased;
and 3.2, obtaining the proportion of the overlapped area to the 2 insufficient water supply areas, if the overlapped area accounts for more than or equal to 50% of one insufficient water supply area, or the total area overlapped with other insufficient water supply areas in one insufficient water supply area is more than 60% of the area of the insufficient water supply area, setting the valve closest to the current insufficient water supply area in a planning graph as a valve needing to be opened, and simultaneously setting the water supply end to which the water end in the current insufficient water supply area belongs as the pressure needing to be increased.
Further, in step 2.8, the sub-step of judging whether the current water supply shortage verification area is the water supply shortage area according to the area pressure degree Δ P is as follows:
and 2.8.1, acquiring the estimated demand of the water supply shortage verification area where the pressure degree delta P of the current area is located at the current moment, wherein the estimated demand is the arithmetic average of the water consumption of the water supply shortage verification area in the last 12 hours, if the water demand at the current moment is in a peak period, the peak period refers to a period that the water consumption per unit time is larger than the estimated demand, if the delta P is smaller than a set threshold value, the current water supply shortage verification area is judged not to be the water supply shortage area, and if not, the current water supply shortage verification area is the water supply shortage area.
In a preferred embodiment, the threshold is 0.1 MPa.
Further, in step 4, the sub-steps of controlling the valve and the water supply end by the measures to be taken are as follows: the valve to be opened and the pressurized water supply end are adjusted, and the water end with insufficient water supply is detected at an interval T1 until the pressure difference between the water end and the water supply end falls back to be within the first threshold value.
A load balancing system for a municipal water supply network, the system comprising:
a pressure sensor network: the pressure sensor network is used for acquiring the water pressure of the water supply end and the water using end and consists of a plurality of pressure sensors arranged at the water supply end and the water using end, and the pressure sensor network further comprises a data transmission module;
the water supply control module: the water supply pressure is used for controlling the water supply pressure of the water supply end;
valve control network: the controllable valve opening and closing device consists of one or more controllable valves and action elements for controlling the controllable valves, and is used for controlling the opening and closing of the controllable valves;
a data processing module: the water supply control module is used for processing data from the pressure sensor network and outputting control instructions to the valve control network and the water supply control module.
The present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method as provided by the first aspect of the present disclosure.
The present invention provides an electronic device, including: a memory having a computer program stored thereon; a processor for executing the computer program in the memory to implement the steps of the method provided by the present disclosure.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention realizes the dynamic monitoring and adjustment of the water supply network, so that the area with insufficient water supply can be adjusted, and the adjustment mode comprises the steps of increasing the pressure of a water supply plant and adjusting water from other pipe networks.
Drawings
The foregoing and other features of the present invention will become more apparent to those skilled in the art from the following detailed description of the embodiments taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar elements, and in which it is apparent that the drawings described below are merely exemplary of the invention and that other drawings may be derived therefrom without the inventive faculty, to those skilled in the art, and in which:
FIG. 1 is a flow chart of a method of load balancing a municipal water supply network according to the invention;
FIG. 2 is a block diagram illustrating a load balancing system for a municipal water supply network, in accordance with one embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting.
It is also to be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the invention, and that certain insubstantial modifications and adaptations of the invention by those skilled in the art in light of the foregoing description are intended to be included within the scope of the invention. The specific process parameters and the like of the following examples are also only one example within a suitable range, i.e., those skilled in the art can select the appropriate range through the description herein, and are not limited to the specific values exemplified below.
The following is an exemplary description of a method of load balancing a municipal water supply network according to the present invention.
Referring to fig. 1, a flow chart of a load balancing method for a municipal water supply network is shown, and the load balancing method for the municipal water supply network according to the embodiment of the invention is described in conjunction with fig. 1, and the method comprises the following steps:
step 1, obtaining a planning map of a municipal water supply network, and dividing the planning map into a plurality of subnets;
step 2, detecting the real-time flow of each subnet, and outputting an area set with insufficient water supply;
step 3, determining measures to be taken according to the regional set with insufficient water supply;
and 4, controlling the required measures to control the valve and the water supply end.
Further, in the step 1, a planning map of the municipal water supply network is obtained, and the substep of dividing the planning map into a plurality of subnets is as follows:
obtaining a layout of a municipal water supply network, wherein the layout comprises at least one water supply end and one water using end, the water supply ends in the layout are marked as a water supply end set S ═ S1, S2, S3, … …, Se }, and e is the number of the water supply ends; the sub-elements Sx in the water supply end set comprise all water using ends under the selected xth water supply end, and the water using ends form a set Dx ═ { Dx ═1，Dx2，Dx3，……，DxnN is the number of water using ends below the selected water supply end, and is different for each water supply end;
in the initial state, the water of each water using end is supplied by one water supplying end and supplied from the water using end to the water supplying end passing the shortest distance, all the water using ends under each water supplying end are not communicated with all the water using ends under the other water supplying end, and one water supplying end and the water using end connected with the water supplying end form a subnet;
the layout drawing also comprises one or more valves capable of controlling opening and closing, the valves are communicated with 2 pipe sections, the pipe sections belong to subnets formed by 2 different water supply ends, and more than one valve can be communicated among the 2 different subnets.
Further, in step 2, the sub-step of detecting the real-time flow rate of each subnet and outputting the set of regions with insufficient water supply includes:
step 2.1, arranging a pressure sensor and a flow sensor at a water supply end and a water using end in a water supply network;
step 2.2, detecting the pressure of all the water ends under each subnet, namely the pressure SPx of the water supply end at an interval T0;
step 2.3, calculating the pressure difference between each water using end and the affiliated water supply end, and obtaining a water using end set PLN with the pressure difference between the water using end and the affiliated water supply end higher than a first threshold value, wherein the set PLN is { PLNi }, and the PLNi represents the pressure difference between the ith water using end and the affiliated water supply end;
in one embodiment, the first threshold is 0.3 MPa;
step 2.4, if the number of the water using ends in the PLN set is larger than 3, sorting the water using ends in the PLN set in a descending order according to the pressure of the water using ends, and combining points of every 3 water using ends in the PLN set to form a water supply shortage verification area, wherein all the water supply shortage verification areas are a water supply shortage verification area set APLN;
step 2.5, sequentially verifying the water supply shortage verification areas of the water supply shortage verification area set APLN in the step 2.4, and if the number of water using ends in the selected water supply shortage verification area is not 0, obtaining a water using end set AD in the water supply shortage verification area;
step 2.6, calculating the estimated pressure EPi of each water end in the set AD:
EPi＝PSi-(Hi-hi)×(ρg)，
in the formula, EPi is estimated pressure of a water using end, PSi is pressure of a water supply end to which an ith water using end belongs, Hi is water head difference between the water supply end to which the ith water using end belongs and the ith water using end, rho is density of water, g is gravity acceleration, Hi is horizontal drop, and the height difference indicates height difference between the water supply end to which a selected water using end belongs and the selected water using end;
preferably, ρ is 1g/cm3G is 9.8;
step 2.7, calculating the trends of the estimated pressure EPi of the water using end and the actual pressure DPi of the water using end in the water supply shortage verification area, and recording the trends as the area pressure degree delta P:
ΔP＝∑(abs(DPi-EPi))/sizeof(AD),
wherein, Δ P is the regional pressure degree Δ P of the water shortage verification region, DPi is the actual pressure of the ith water using end, the estimated pressure of the ith water using end of EPi, abs () is the absolute value of elements in brackets, sizeof () is the size of the elements in brackets, and sizeof (AD) is the number of the elements in the set AD;
step 2.8, judging whether the current water supply shortage verification area is a water supply shortage area or not according to the area pressure degree delta P;
step 2.9, repeating the steps 2.4 to 2.8 until the water supply shortage verification areas in the water supply shortage verification area set APLN are verified;
and 2.10, putting all the insufficient water supply areas into an insufficient water supply area set WSP.
Further, in step 3, the substep of determining the action to be taken according to the set of regions with insufficient water supply is:
step 3.1, traversing the set WSPs of the insufficient water supply areas in sequence, if the current insufficient water supply area is not overlapped with any other insufficient water supply area, judging whether the current insufficient water supply area meets the water supply marginal condition, and if the current insufficient water supply area is overlapped, skipping to the step 3.2;
the meaning of the overlap of the water shortage areas is as follows: whether a water using end with the distance smaller than the distance threshold exists in the insufficient water supply area or not is judged, and if the water using end exists, the insufficient water supply area is marked to be overlapped; otherwise, the data are not overlapped; the distance threshold is set to [50,300] meters;
or setting the insufficient water supply area as a water using area with the radius of [50,300] m by taking the water using end as the center of a circle as the coverage area of each water using end, wherein the insufficient water supply area is formed by all the water using areas;
the marginal condition of water supply is
Min (delta PS) + sigma < delta P ≦ Avg (delta PS) + sigma or delta P ≦ Avg (delta PS) -sigma;
in the formula, Min (Delta PS) is the minimum value of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply, sigma is the variance of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply, and Avg (Delta PS) is the average value of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply;
if the current insufficient water supply area meets the water supply marginal condition, setting a valve which is closest to the current insufficient water supply area in the planning graph as a valve to be opened;
if the current insufficient water supply area does not meet the water supply marginal condition, setting the water supply end to which the water using end in the current insufficient water supply area belongs as the pressure needing to be increased;
and 3.2, obtaining the proportion of the overlapped area to the 2 insufficient water supply areas, if the overlapped area accounts for more than or equal to 50% of one insufficient water supply area, or the total area overlapped with other insufficient water supply areas in one insufficient water supply area is more than 60% of the area of the insufficient water supply area, setting the valve closest to the current insufficient water supply area in a planning graph as a valve needing to be opened, and simultaneously setting the water supply end to which the water end in the current insufficient water supply area belongs as the pressure needing to be increased.
Further, in step 2.8, the sub-step of judging whether the current water supply shortage verification area is the water supply shortage area according to the area pressure degree Δ P is as follows:
and 2.8.1, acquiring the estimated demand of the water supply shortage verification area to which the current area pressure degree delta P belongs at the current moment, if the water demand at the current moment is in a peak period, wherein the peak period refers to a period that the water consumption per unit time is larger than the average value, if the delta P is smaller than a set threshold value, judging that the current water supply shortage verification area is not a water supply shortage area, otherwise, judging that the current water supply shortage verification area is a water supply shortage area.
In a preferred embodiment, the threshold is 0.1 MPa.
Further, in step 4, the sub-steps of controlling the valve and the water supply end by the measures to be taken are as follows:
the valve to be opened and the pressurized water supply end are adjusted, and the water end with insufficient water supply is detected at an interval T1 until the pressure difference between the water end and the water supply end falls back to be within the first threshold value.
Fig. 2 is a block diagram illustrating a load balancing system for a municipal water supply network according to an embodiment of the invention.
A load balancing system for a municipal water supply network, the system comprising:
a pressure sensor network: the pressure sensor network is used for acquiring the water pressure of the water supply end and the water using end and consists of a plurality of pressure sensors arranged at the water supply end and the water using end, and the pressure sensor network further comprises a data transmission module;
the water supply control module: the water supply pressure is used for controlling the water supply pressure of the water supply end;
valve control network: the controllable valve opening and closing device consists of one or more controllable valves and action elements for controlling the controllable valves, and is used for controlling the opening and closing of the controllable valves;
a data processing module: the water supply control module is used for processing data from the pressure sensor network and outputting control instructions to the valve control network and the water supply control module.
The load balancing system based on the municipal water supply network can operate in computing equipment such as desktop computers, notebooks, palm computers and cloud servers. The load balancing system of the municipal water supply network can be operated by a system comprising, but not limited to, a processor and a memory. It will be appreciated by those skilled in the art that the illustrated example is merely illustrative of a load balancing system for a municipal water supply network and is not intended to be limiting, and may include more or less components than, or in combination with, certain components, or different components, for example, the load balancing system for a municipal water supply network may also include input output devices, network access devices, buses, and the like.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like that is the control center for the load balancing system operating system of the one municipal water supply network that connects the various parts of the load balancing system operable system of the entire one municipal water supply network using various interfaces and lines.
The memory may be used to store the computer programs and/or modules, and the processor may be configured to implement the various functions of the load balancing system for a municipal water supply network by running or executing the computer programs and/or modules stored in the memory, and by invoking the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Although the present invention has been described in considerable detail and with reference to certain illustrated embodiments, it is not intended to be limited to any such details or embodiments or any particular embodiment, so as to effectively encompass the intended scope of the invention. Furthermore, the foregoing describes the invention in terms of embodiments foreseen by the inventor for which an enabling description was available, notwithstanding that insubstantial modifications of the invention, not presently foreseen, may nonetheless represent equivalent modifications thereto.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.
Claims (9)
1. A method of load balancing a municipal water supply network, the method comprising the steps of:
step 1, obtaining a planning map of a municipal water supply network, and dividing the planning map into a plurality of subnets;
step 2, detecting the real-time flow of each subnet, and marking an area set with insufficient water supply in each subnet;
step 3, determining measures to be taken according to the regional set with insufficient water supply;
and 4, controlling the required measures to control the valve and the water supply end.
2. The method for load balancing of a municipal water supply network according to claim 1, wherein in step 1, a planning map of the municipal water supply network is obtained, and the sub-step of dividing the planning map into a plurality of sub-networks is:
obtaining planning map data of a municipal water supply network, wherein the planning map data comprises at least one water supply end and at least one water using end, a background topographic map, pipe sections and the burial depth of each pipe section; wherein, the water consumption end is the water consumption point and the designed water consumption of each water consumption point; the water supply end is a water source point and water supply pressure data information of the water source point;
each water supply end is correspondingly connected with at least one water using end, each water supply end and the water using end connected with the water supply end form a subnet, namely, each water using end at least belongs to one water supply end;
marking the water supply ends in the layout as a water supply end set S ═ S1, S2, S3, …, Sx, …, Se }, and e is the number of the water supply ends;
wherein, the sub-element Sx in the water supply end set comprises all the useful water ends corresponding to the selected xth water supply end, and x is equal to [1, e ]]The water end forms a set Dx ═ { Dx ═ Dx1，Dx2，Dx3，……，DxnN is the number of water using ends below the selected water supply end;
in an initial state, water for each water using end is supplied by one water supplying end and supplied from the water using end to the water supplying end passing the shortest distance, all the water using ends under each water supplying end are not communicated with all the water using ends under the other water supplying end, each water supplying end is connected with a valve for controlling opening and closing, the valve is communicated with a pipe section of the water supplying end, the pipe section belongs to a subnet formed by 2 different water supplying ends, more than one valve can be communicated among the 2 different subnets, and the valve is an automatic valve.
3. The method of claim 1, wherein in step 2, the real-time flow rate of each subnet is detected, and the sub-step of marking the set of regions with insufficient water supply in each subnet comprises:
step 2.1, arranging a pressure sensor and a flow sensor at a water supply end and a water use end in a water supply network;
step 2.2, detecting the pressure of all the water ends and the pressure SPx of the water supply end under each subnet and the pressure of the xth water supply end at an interval T0;
step 2.3, calculating the pressure difference between each water using end and the affiliated water supply end, and obtaining a water using end set PLN with the pressure difference between the water using end and the affiliated water supply end higher than a first threshold, wherein the set PLN is { PLNi }, and PLNi represents the pressure difference between the ith water using end with the pressure difference higher than the first threshold and the affiliated water supply end;
step 2.4, if the number of the water using ends in the PLN set is larger than 3, sorting the water using ends in the PLN set in a descending order according to the pressure of the water using ends, sequentially taking each 3 water using ends in the sorted set PLN as one group, taking each group as a water supply shortage verification area, and taking all the water supply shortage verification areas as a water supply shortage verification area set APLN;
step 2.5, sequentially verifying the water supply shortage verification areas of the water supply shortage verification area set APLN in the step 2.4, and if the number of water using ends in the selected water supply shortage verification area is not 0, obtaining a water using end set AD in the water supply shortage verification area;
step 2.6, calculating the estimated pressure EPi of each water end in the set AD:
EPi＝PSi-(Hi-hi)×(ρg)，
in the formula, EPi is estimated pressure of an ith water using end, PSi is pressure of a water supplying end to which the ith water using end belongs, Hi is water head difference between the water supplying end to which the ith water using end belongs and the ith water using end, rho is density of water, g is gravity acceleration, Hi is horizontal drop, and the horizontal drop refers to height difference between the water supplying end to which the selected water using end belongs and the selected water using end;
step 2.7, calculating the trends of the estimated pressure EPi of the water using end and the actual pressure DPi of the water using end in the water supply shortage verification area, and recording the trends as the area pressure degree delta P:
ΔP＝∑(abs(DPi-EPi))/sizeof(AD),
wherein, Δ P is the regional pressure degree Δ P of the water shortage verification region, DPi is the actual pressure of the ith water using end, the estimated pressure of the ith water using end of EPi, abs () is the absolute value of elements in brackets, sizeof () is the size of the elements in brackets, and sizeof (AD) is the number of the elements in the set AD;
step 2.8, judging whether the current water supply shortage verification area is a water supply shortage area or not according to the area pressure degree delta P;
step 2.9, repeating the steps 2.4 to 2.8 until the verification of the water supply shortage verification areas in the water supply shortage verification area set APLN is finished, and marking all the water supply shortage areas;
and 2.10, adding all the water shortage areas into the water shortage area set WSP.
4. The method for load balancing a municipal water supply network according to claim 1, wherein in step 3, the substep of determining the action to be taken based on the set of regions with insufficient water supply is:
step 3.1, traversing the set WSPs of the insufficient water supply areas in sequence, if the current insufficient water supply area is not overlapped with any other insufficient water supply area, judging whether the current insufficient water supply area meets the water supply marginal condition, and if the current insufficient water supply area is overlapped, skipping to the step 3.2;
the marginal condition of water supply is Min (delta PS) + sigma < delta P and is not less than Avg (delta PS) + sigma or delta P is not less than Avg (delta PS) -sigma;
in the formula, Min (Delta PS) is the minimum value of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply, sigma is the variance of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply, and Avg (Delta PS) is the average value of the regional pressure degrees Delta P of all the regions with insufficient water supply in the region set with insufficient water supply; if the current insufficient water supply area meets the water supply marginal condition, setting a valve which is closest to the current insufficient water supply area in the planning graph as a valve to be opened;
if the current insufficient water supply area does not meet the water supply marginal condition, setting the water supply end to which the water using end in the current insufficient water supply area belongs as the pressure needing to be increased;
and 3.2, obtaining the proportion of the overlapped area to the 2 insufficient water supply areas, if the overlapped area accounts for more than or equal to 50% of one insufficient water supply area, or the total area overlapped with other insufficient water supply areas in one insufficient water supply area is more than 60% of the area of the insufficient water supply area, setting the valve closest to the current insufficient water supply area in a planning graph as a valve needing to be opened, and simultaneously setting the water supply end to which the water end in the current insufficient water supply area belongs as the pressure needing to be increased.
5. The method for load balancing of a municipal water supply network according to claim 1, wherein the substep of controlling the action to be taken to control the valves and the water supply terminals in step 4 is:
the valve to be opened and the pressurized water supply end are adjusted, and the water end with insufficient water supply is detected at an interval T1 until the pressure difference between the water end and the water supply end falls back to be within the first threshold value.
6. The method for load balancing of a municipal water supply network according to claim 3, wherein the sub-step of determining whether the current water shortage verification region is a water shortage region according to the regional pressure Δ P is:
and 2.8.1, acquiring the estimated demand of the water supply shortage verification area where the pressure degree delta P of the current area is located at the current moment, wherein the estimated demand is the arithmetic average of the water consumption of the water supply shortage verification area in the last 12 hours, if the water demand at the current moment is in a peak period, the peak period refers to a period that the water consumption per unit time is larger than the estimated demand, if the delta P is smaller than a set threshold value, the current water supply shortage verification area is judged not to be the water supply shortage area, and if not, the current water supply shortage verification area is the water supply shortage area.
7. A load balancing system for a municipal water supply network, the system comprising:
a pressure sensor network: the pressure sensor network is used for acquiring the water pressure of the water supply end and the water using end and consists of a plurality of pressure sensors arranged at the water supply end and the water using end, and the pressure sensor network further comprises a data transmission module;
the water supply control module: the water supply pressure is used for controlling the water supply pressure of the water supply end;
valve control network: the controllable valve opening and closing device consists of one or more controllable valves and action elements for controlling the controllable valves, and is used for controlling the opening and closing of the controllable valves;
a data processing module: the water supply control module is used for processing data from the pressure sensor network and outputting control instructions to the valve control network and the water supply control module.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
9. An electronic device, comprising: a memory having a computer program stored thereon; a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 6.
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